Power-hammer for forging tapered work.



. No.v8l1,669.

PATENTED FEB. 6, 1906. W. E. SHEEHY. POWER HAMMER FOR FORGING TAPERED WORK.

J wags.

APPLIGATIONIILED JULY 25,1903.

UNITED STATES PATENT OFFICE.

WILLIAM E. SHEEHY, OF BOSTON, MASSACHUSETTS.

POWER-HAMMER FOR FORGING TAPERED WORK.

Specification of Letters Patent.

Patented Feb. 6, 1906.

Application filed July 25,1903. Serial No. 166,943.

To (r/ZZ 11/720711, it may concern.-

Be it known that I, WILLIAM E. SHEEHY, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Power-Hammers for Forging Tapered Work, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to a power-hammer which is especially adapted for forging tapered work and sharpening the end of the taper.

According to thepresent process of forging tapered worksuch, for instance, as coldchisels, picks, and the likethe work is first roughed out on an ordinary power-ham1ner having a fixed anvil-face and is afterward smoothed up and sharpened by hand. This operation requires considerable time and is more or less tedious.

The object of the present invention to be herein described is to provide novel means whereby tapered work can be quickly and accurately shaped and sharpened by a power hammer with but a single heating of the stock. I accomplish this object by providing anove] anvil or anvil-die having the workreceiving face, or that on which the hot metal is laid while being shaped, free to be tipped that it may incline downwardly toward the operator more or less, according to the taper the operator desires to impart to the stock. Figure 1 of the drawings shows in side ele.

vation a sufficient portion of a power-hammer with my improvements added to enable my invention to be understood. Fig. 2 is a plan view showing the main or stationary an- 'vil and the auxiliary anvil alongside of it. Fig. 3 is a like view with the work-receiving face of the auxiliary-anvil member removed. Fig. t is a section on the line 00 m, Fig. 2. Fig. 5 is a right-hand end view of the parts shown in Fig.2; and Figs. 6 and 7 are sectional views, respectively, in line it and 00 Fig. 2 showing different positions of the auxiliary anvil during different periods of tapering the stock, the views showing opposite ends of said anvil.

In the form of the invention herein shown I employ a main or fixed anvil having a fixed face and an auxiliary anvil which is freely tippable, so that its face can be tipped more or less toward the operator, according to the taper it is desired to give to the work. The

auxiliary anvil is shown located at one side of the fixed anvil, and both anvils are situated under the face of the hammer, so that the latter may strike the stock laid on either anvil. The work-receiving face of the auxiliary anvil for part of its length is rounded at its edge farthest from the operator or is so shaped as to enable a hot bar to be not only tapered, but also hammered to a sharp edge, and the remaining portion of the work-receiving face of the auxiliary anvil is substantially a plane surface, the latter being used mostly for sustaining the side edges of a chisel rather than the flat sides thereof, as the side edges need to be struck by the hammer, as commonly practiced in drawing out tapered work to thereby keep the side edges in proper shape.

A designates the usual frame of a powerhammer, B the reciprocating hammer-car rier, and O the hammer, said carrier and ham mer being moved toward and from the anvil in any usual way, and D is the treadle. Inasmuch as the hammer and the means for reciprocating it form no part of my present in vention, I do not consider it necessary to fur ther describe the same.

The hammer-frame has means for detachably supporting a block E, which is herein shown as being shaped at one end to constitute a stationary or main anvil-face e. Said block E is provided with a recess the bottom e of which has a cylindrical shape, as shown in Figs. 4, 6, and 7. Said block also has a pit or concavity a and the passages 4 and 5 leading therefrom. The ends of the pit or concavity 0 form stop-shoulders 2 and 3.

The auxiliary anvil is designated by F and is preferably semicylindrical in shape, it having the parti-cylindrical convexed lower side which fits and rests on the parti-cylindrical bottom 6 of the recess in the block E, as shown in Figs. 4, 6, and 7. Said auxiliary anvil also has a proj ectionf, which enters the pit or concavity 6 and by its engagement with the stops 2 and 3 determines the extent of the tipping or rocking movement of said auxiliary anvil. Since the convexed bottom of the auxiliary anvil and the concaved bottom of the recess in the block E are both parti-cylindrical, it will be obvious that the auxiliary anvil can tip or rock within the recess, the curved bottom of said anvil during such tipping or rocking movement sliding to and fro on the concaved bottom of the recess, which forms a seat for the anvil. With this contruction the axis about which the anvil tips is situated substantially in the face thereof, and the center of gravity of the auxiliary anvil or die is below the axis. With such construction the auxiliary anvil or die will have a firm seat or bearing in the block E in any position which it may assume, and it will remain in any adj usted position until its position is changed by theiorce of a blow of the hammer. The movement of the curved bottom of the auxiliary anvil in the seat described results in tipping or inclining its work-receiving face or upper side more or less out of a horizontal plane or out 'of parallelism with the face of the hammer. Dust or scale working in between the auxiliary anvil and its seat enters the pit and isby the movement of the projection f there in forced therefrom into the passages i and 5 and out therethrough onto the floor. A portion f 2 of the work-receiving face of the auxiliary anvil nearest the main anvil e is shaped as best shown in Fig 6, wherein it will be seen that the rear or left-hand edge of said face is rounded, as at 7, so that a portion of the end of the stock being hammered may be presented between the hammer and anvil and be hammered to a substantially sharp edge. In Fig. 6 it will be seen that the hammer is in contact with the rounded edge of the portion 0 f of the work-receiving face, that said face is tipped, and that the stock or metal being hammered fills the space between the top of the anvil and the under side of the hammer. The hammer may meet this rounded edge and not be damaged, and owing to the edge being rounded it is possible to bring the end of the stock to a sharp edge. The portion f 3 of the work-receiving face of the auxiliary anvil at the right of the portion f 2 presents a substantially plane face, which extends clear to the convexed exterior of said auxilary anvil. On this portion the edges of the stock may be placed from time to time between hammerings of the side face, as is common in drawing stock by a hammer and anvil to keep the side edges true. The more the face of the auxiliary anvil is tipped or inclined downwardly toward the operator holding the stock the sharper or more abrupt the ta-- per of the stock and the more nearly the face of the anvil to a h orizontal plane thelonger and less abrupt the taper. The operator may give any desired taper to the stock by properly gaging the position of the stock on the auxiliary anvil, for if the stock is withdrawn or moved toward the operator, as shown in Fig. 4, the force of the blow of the hammer will be received by the auxiliary anvil at one side of its axis, and said anvil will consequently be turned or tipped, the extent of the tipping depending upon the distances which the stock has been withdrawn or, in other words, the distance from the axis at which the force of the blow of the hammer was received by the auxiliary anvil. When the auxiliary anvil has been thus tipped into operative position, as shown in Fig. 6, it will remain in such position, and the work will be given a definite taper so long as the stock remains in the same position on the auxiliary anvil. If it is found that the taper being made upon the work is too short, the operator will move the work'forward or away from him, so that the force of the next blow of the hammer will be received by the anvil at a point nearer its axis, and the result will be that the anvil will turn back toward its horizontal position more or less dependent upon the amount which the stock has been shifted. On the other hand, if the taper is found to be not sufficient the operator will withdraw the work or move it toward him, with the result that the force of the next blow will be received by the auxiliary anvil at a greater distance from its axis, and said anvil will be turned so that its face will have a greater angle with the face of the hammer. Whenever it is desired to bring the auxiliary anvil back into a horizontal position again, the stock will be laid upon the portion f 3 of its work-receiving face, as shown in Fig. 7. A light blow of the hammer upon the stock when in this position will act through the stock against the corner of the auxiliary anvil and operate to lock said anvil back into its horizontal position, as will be obvious. When in such position, either portion of the auxiliary anvil may be used in keeping the edges of cold-chisels and similar articles parallel. By rounding the rear edge 7 of the portion f of the work-receiving face of the auxiliary anvil it is possible to cause the hammer to act on the stock on the anvil and bring the same to a substantially sharp edge, as shown in Fig. 6, and in this operation the face of the hammer will not become battered or injured by striking the edge of the anvil, as would be the case if said corner were not rounded, as shown.

To retain the circularly movable or tipping auxiliary anvil in its seat in the block E, I have shown a screw g, extended through the block at one end and entering a circular groove g in the end of the auxiliary anvil. I preferably provide the head of this screw with the weight 9, which serves to prevent the screw from becoming loosened by the arring of the hammer.

In tapering some kinds of work the broader sides are tapered and the edges kept parallel. To do this, it is necessary either to frequently change the rocking anvil from its tipped to its horizontal position or to shift the work from the rocking anvil to the main anvil 6 several times during one heat.

anvil will be so placed upon the hammerframe that the hammer-face stands over both the main anvil and the auxiliary anvil.

As herein shown, the block E is provided with a dovetailed rib e, which sets into a correspondingly-shaped groove in the hammerframe.

In some cases it may not be necessary to make the rocking or auxiliary anvil f with the portion f and in such cases the face of said anvil will be made in one plane.

Believing that I am the first to provide a power-hammer with this type of freely-tippable auxiliary anvil, I desire to claim the same broadly and do not Wish to be limited to the particular construction shown, as the same may be varied in many ways without departing from the spirit of the invention expressed in the appended claims.

Having described my invention, What I claim as new, and desire to secure by Letters Patent, is-- 1. In a power-hammer for shaping tapered work, a hammer and an anvil comprising a block having a recess and a member resting on and in sliding engagement with the bottom of the recess and normally free to rock about a single axis parallel to the face of the hammer, said member having its center of gravity below its axis and thereby being maintained in any adjusted position in the recess.

2. An anvil for power-hammers comprising a block, and a member supported thereby and normally free to rock about an axis parallel to the face of the hammer, said member having a substantially flat work-receiving face, one edge of which is rounded.

3. An anvil for a power-hammer, co1nprising a block having a parti-cylindrical recess, a rocking-anvil die received in said recess, said die having a work-receiving face and a cylindrical bottom to rest and slide upon the bottom of the recess as the die is rocked about an axis substantially in the plane of the work-receiving face.

An anvil for a power-hammer, comprising a block having a cylindrical recess, a substantially semicylindrical rocking-anvil die sustained in said recess, the sides of the recess embracing the sides of the die whereby the die has in any position a firm seat on the bottom of the recess.

hammer and a two-part anvil, one of said parts of the anvil having a freely-movable face and the other a fixed face, both of said faces being situated beneath the hammer.

8. In a power-hammer for shaping tapered work, a reciprocating hammer, a fixed anvilbloclr having a portion constituting a fixed anvil-face, and a freely-rocking auxiliary-anvil die supported by said block, said auxiliary anvil and the fixed face of the anvilblock both being situated beneath the hammer.

9. An anvil-die, a block recessed to sustain said die, said die being normally free to tip under the action. of the work, and means to eject scale from said recess by the rocking movement of the die.

10. An anvil-die having a projection at its convexed under side, and a block recessed to sustain said anvil-die loosely, said block hav ing a pit and passages for the escape of scale.

11. In an anvil for a power-hammer, a block, and an anvil-die supported thereby to rock about an axis parallel to the hammerface, the center of gravity of said die being below its axis.

12. An anvil for a power-hammer, comprising a block having a parti-cylindrical recess and a parti-cylindrical anvil-die received in said recess and capable of turning therein about an axis situated substantially in the face thereof.

13. In an anvil for a power-hammer, comprising an anvil-die, a block recessed to sustain said die that it may be tipped about an axis substantially in the face thereof.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM E. SHEEHY.

Witnesses:

Louis C. SMITH, GEO. W. GREGORY. 

